I wasn't just nitpicking.
I genuinely don't think it's fair to say that our morals are completely defined by external factors, nor, to a lesser degree of acuteness, that our morals are so determined by external factors that we should deem "independent morality" a contradiction in terms.
That's all... and I don't think it's at all an unfair point to make...
I think any truly intelligent person would want to be wary of closing their mind regarding that assumption.
You seem like an intelligent guy to me, and, as such, I genuinely believed you were walking down a path that you ought to reconsider.
Also, in my opinion, I believe they were both really just expressing the self-importance of their own Fi values.
It would basically, translated into typological terminology, be like saying:
Authenticity : Inauthenticity
Fi : Fe
Fi = Authenticity
Fe = Inauthenticity
There is a potential deeper contradiction in there as well (it's actually essentially the same one I pointed to earlier about MLK), but that's life, ain't it?